Re: [PATCH v2 3/3] fast-import: disallow "merge $itself" command

Dmitry Ivankov wrote:

"merge $itself" may be used to create commits with previous branch tip
being repeated as n-th parent or even moved from being 1-st to be just
n-th. This is not a documented use case and doesn't look like a common
one.

[...]

Just deny "merge $itself" for now. It was a bit broken and btw "from
$itself" was and is a forbidden command too.

Lovely.  Thanks for a clear patch and clear explanation.

For what it's worth, this one is
Acked-by: Jonathan Nieder <redacted>

I'll think more about the other two and get back to you.